High temp followed by low body temp

Recently our son (1 year old) had a high temp, up to 103.5. No meds were given because he was eating drinking and acting well. Then after the temp broke it dropped down into th 96-95 zone which is terrifying. Lost appetite and mood decreased. Slight rash broke out and disapeared. Pediatricians don't believe he temp was that low and are absolutely no help. Don't know what to do or how to handle this any help would be greatly appreciated this is very stressful considering we can't get help. We're worried about sepsis and hypothermia. The baby seems to be getting better he is eating and drinking mood got better but still hovering around 97 degree temperature